PCB main controller question

I would like to change my PCB but i have one question before i purchase you mention on your notes for the product that the main you should change the main controller IC so that the HDD recognize can you please explain this as by change the PCB i thought i would be also changing the main controller IC ?

PCB main controller questionPCB main controller question

Every PCB’s BIOS/Main Controller IC including the unique info, you should change it. Otherwise, the HDD will not work.

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